I have 4 pre-wet systems, i don't use them that much at all. I got all 4 when i bought my v-box spreaders, the dealer was selling them at a good price. Meyer/Diamond/Swenson all offer pre-wet systems, because Swenson is owned by meyer, and builds speaders for all of meyers companies. Meyer actually has some neat setups for spreaders that i haven't sean any where else, they offer a replacement tailgate spreader for dumpbodies, and an under the tailgate spreader, both with pre-wet.<p>Anyways i use Mag/chloride in my pre-wet systems. It coats the salt, sand , or sand/salt mix with the liquid. This helps to make the salt work at lower temps so less material is needed. If i have a high trafic area such as an intersection, hill, curve, or any place where traction is a must. I will tell the driver to turn on the pre-wet system and keep the material speed the same, when the mag/chloride hits the sand and salt, it works a lot better than just sand/salt. It will melt a lot more snow and ice, then just sand and salt, or even pure salt.<p>Geoff<p>